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    <title>分区元素</title>
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    马上就 <span style="color:orange">万圣节</span>了,你打算怎么过?
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    我是内容
    <div>我是内容</div>
    我是内容
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    我是内容
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    <div class="header">顶部条</div>
    <div class="nav">导航栏</div>
    <div class="main">主题内容</div>
    <div class="aside">侧边栏</div>
    <div class="article">文章</div>
    <div class="section">某个区域</div>
    <div class="footer">底部</div>
    <hr>

    <header>顶部条</header>
<nav>导航栏</nav>
<main>主题内容</main>
<aside>侧边栏</aside>
<article>文章</article>
<section>某个区域</section>
<footer>底部</footer>
</body>
</html>